Concrete form



I gnue'nto'z Ham/n. Goldsmifh I w. M. GOLDSMITH CONCRETE ,FORM

Filed July 8, 1926 April 28, 1931.

1 I l l I I l I l l l l I I l I Patented Apr. 28, 1931 UNITED s'mrlzzs or CTNGINNATI; OHIO, nssrenoniro THE eonnsmrn mnran 7 WILLIAM M. GOLDSMITH,

PATENT "OFFICE; v

LATE COMPANY, OF CINCINNATI, OHIO, A CORPORATION or OHIO ooNcnE'rE some:

Application filed--J'u1y'8;'1926.- Serial 1%. 121,183; 1

. t This invention relates to metal forms for use in concrete construction and particularly in the construction of concrete floors and beams.

An object of my invention is to provide a form for the purpose stated, which isprovided withtelescoping end closure portions.

Another object is to provide a form of the class described which comprises an uninterrupted surface to the concrete to the end that it may be easily stripped from'the concrete afterthe concretehas set Another object is to provide a device of this kind which has great flexibility. so that removal of the forms from concrete is facilitated and the danger of distorting the top is eliminated.

These and other objects are attained by the means describedherein and disclosed in the 2 accompanying drawings in which Fig. 1 is a cross sectional view of a concrete floor andtemporary supporting structure, showing devices of my invention embodied therein.

Fig. 2 is a cross sectional view on line 22 of Fig. 1.-

Fig. 3 is a similar view of a modified form of my invention.

Fig. 4 is a fragmental end View taken on line 4-4 of Fig. 3. r

Fig. 5 is a cross sectional view on line 55 of Fig. 2.

Fig. 6 is a perspective view ofan end flap member forming a detail of my invention.

The forms of my invention comprise a sheet of suitable metal bent to provide a substantially flat top .6 and angularly disposed side walls 7 extending from the opposite longitudinal sides of the top 6. At each end of each of the side walls 7 and-top 6 is secured an inwardly extending flap 8, the bottom edge 9 of which extends parallel to the top 6 and substantially aligned with the edges 10 of side walls 7. The flaps 8 are provided with integral angularly disposed flanges 11, which are suitably secured to the inner faces of side walls 7 by spot welding, riveting, or. any other suitable means. The free edges 12 of 1 I opposed flaps 8 are spaced from one another so as to permit flexing of the side walls 7 relatively to the top 6 without overlapping the edges 12 of the flaps 8. The top flanges 13 of flaps i8 are secured to the' lower face of the top 6. As shown in Figse and 4 a closing-plate 14 has an angularly disposed ledge 15, cut away at its opposite ends, and

secured to lower face of top 6. At itslower edge the plate is provided with an inwardly turned U-shaped; portion 16; providing a groove 17 in which the" lower edges 9 of flaps 8 are slidably retained. V

In the embodiment shown in Figs. 1, 2 and 5, the closing plate 18 takesthe form of a flat sheet having its top flangejspot welded or otherwise secured to the top 6 of the form and has secured to its inner face 19 a transversely extending bar 20. The opposite ends 21 of bar 20 are offset from closing plate 18 sufiicientlyfto permit the flaps 8 to-bereciprocally retained between such ,oflset portions andface 19 of the plate.

The closing plates and their associated end flapsyin each embodiment shown, serve to mutually support one another against bodily separation. 'Th'e ends thus formed are reinforc'ed against the pressures due to the weightof wet concrete. disposed-about the forms when in use." The spaced overlapping vertical portions of metal permit of the use oftcoir'iparatively light gage sheet metalfor these =end closures.

From the foregoing it will be apparent that ineach of the embodiments described the sidewalls 7 may be 'freelyfflex edrelatively to the top 6.and that the flaps may be moved toward and away from one'another in a common plane while the closing plates cover the gap betweenthe spaced edges 12 of adjacentflaps 8. The outer exposed edges 20 of closing plates 14 or 18are'disposed substantially perpendicular to the top 6 and the hardened concrete mayise't to preclude facile removal of the forms.

.bf sidewalls 7 may be disposed upon soflits 21.10rming, part of a temporary; structure.

end structures of-the formsarefree from de- .press ons or projections agalnst which the The forms are suitably spaced and-"may .be

toenailed along their inner ed ges by'means 9 s ita eel drives i a hs refit When the shoring 23 and the temporary support structure, including sofiits 21, are removed the side walls 7 may be flexed toward one another without distorting the top 6. The slidable relation of the flaps 8 to closing plates 15 or 18 permits free movementof the sides so that the forms may be stripped from the concrete and again used in another struc'-' ture. It should be noted. that the closing plates 14 and;18' in the several embodiments preclude entry of the concrete into abutment with the spaced edges 12 of the flaps- 8 and thus precludes the formation of abutting ledges of concrete which would "preclude movement of the flaps. The arrangement of the ei id fl'a'p's permits flexing of the form at two places along the top 6, so that greater flexibility is attained without dsngsriof dist'or'ting the top [and this results in facilitating stripping or the forms from thejconcrete and also prolongs the period of utility of the form. I we I ,Ido' not limit myself to the exact structures disclosed as they maybe modified within the spirit and scope of this invention.

' :What I'claim'is:

,1. An arch "ormfor use in concrete clonsanction comprisinga substantially flat top portion and integral spaced side walls, the top and sidewalls beingflexible' at their apgroximate junctions, a 7 pair of aligned end P's,- each end flap extending at substantiala angle to its side'wa1'1 and secured t 'reto', the flapsfextending' toward one another, and a closing plate provided with means for retaining the end flapsin align- "me'ntwith one another and permitting 1on it'u'dinal reciprocation of the flaps-beneath ate as the side walls are'flexed relat vely to'tlie top.

subscribed thereof spaced from one another and a plate for closing the space between the free edges of the flaps and for covering said free edges and permitting free slidable movement of the flapsrelatively to said plate.

In a device of the classdescribed the combination of a U-shaped form comprising atop and side members, the top and side members-being capableof flexing at their approximate junctions, end flaps secured interiorly of the form upon the side walls thereof. and extending for a distance across the end of the form, and an imperforate closing. plate retained in abutment with the outer faces of the flaps and ermitting movement ofthe flaps toward an j away fromone another as the side walls are flexed relatively to the top.

6. A form comprising an integral el 'ongated flexible 'U sha'ped sheet metal member, flaps secured to the arms of the 'U -'sha-ped member and extending for a distance across the end thereof, and an imperfora'te closing plate overlapping the flaps upon the outer faces thereof. 5

7. An elongated flexible arched fornrcomprising a top and arms capable of flexing at their approximate junctionsy-end' naps; one flap connected to each a' rni'and extending to- Ward theother, a plate carried by the top '9 and extending over the acent ends of the flaps, and abar carried by the plate on its inner face and having its oppesiteenas slidably projecting over th'e said adjacent ends lofthe flaps. v y

In testimony whereof, I have hereunto my name this 2nd day of my,

WILLIAM M. GOLDSMITH.

2. A form com rising a top mag e-d side walls, flexible at the approximate junctions of the 'top and jsaid'wiills, an 1 d flap disposed within the body ines t m form and secured toaside wall thereof adjacent {its eiid,fand a closingplate arranged to per "slidable reciprocation of the end fiapbesaid plate, the flap and plate presenting an imperfo'rate closure at the end of the rth: t I

3;. In a device of the class described the 'ination'o'fiaform coinprising a top and angulajrly disposed side walls, the top and walls being flexible at their v approximate junctions, fend flaps secured to the side walls and extending in spaced alignment with one Opposed e es thereof. V 1 7 1 deviate f e class assessed the fi iril mation of a U-s p for comprisin top mid side walls" the P andside walls redeem-gets end flaps'fand answerin the b ing flexibleat then-appro imate junctions, see flaps e med be the inner faces tr 'b "posed side "wallsand havingthe'ifr'ee edges 

